There have been conflicting reports regarding whether you can summon Gurthan alone or not. You can try, but we do not guarantee that it works.

Regarding the above, I tried to summon Gurthan solo and failed. It may have been a bug or something. Fortunately I logged out there and when I logged back in a Horde was on the red rune waiting for some assistance, which I was happy to be the helper. If someone knows a trick to solo start this I would appreciate the knowledge-sharing.

This is a very good guide, as usual with Icy-Veins, and I cannot believe no one has anything to add yet in the comments. It must mean this guide is just too perfect, lol.

I imagine those hard working people that scramble to get all the updates in are rather busy after this recent patch. I hope this piece of info helps a little. For this repeatable quest, one only needs 5 of the Dread Amber Shards now. I wish I knew that was coming but I did have most of what I needed to reach exalted.